Weatherproof cap and shell for incandescent electric lamps.



A C. AQ YB'IYI'JIL`` WEATHERPROOF GAP ND SHELL FOB. INCANDSGENTELEGTBIG LAMPS.. APILgoATIQy FILED JULY a1, -1913.

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CLARENCE A. 'VE'.I'LER,I OF PITTSBURGH, PENNSYLVANIA.

' WEATHERPROOF GAP AND SHELL FOB, INCANDESCENT ELECTRIGLAMPS' To all whom it may concern? Be it known that l, CLARENCE A. "Jia'romn, a citizen of the Unitedl States, residing atV I nature, characteristic features and scope of for the terminal wires has lugs, or offsets 5,-

which takeinto said recesses and prevent the invention will more readily be understood from the following description taken in connection with the accompanying drawing, formlng a part hereof., wherein- Figure 1, is a sectional View of a weatherproofshell and cap formed in accordance with my,r` invention. F ig. 2 is a vertical cross-sectional view of the cap. Fig. 3 is a top view of 'the shell with the cap removed. Fig. 4 is a vertical sectional view ofthe shell; and Fig. 5 is a sectional view of a modification. l

Referring to the drawing, the numeral l, designates a shell formed of porcelain or an `equivalent substance suitable for the purpose.' Its complemental cap 2, which may be formed 'of the same material, has va depending flange or Skirt with interior screw threads-to engage acorrespondingly threaded part of the shell. At opposite sides the rim or top of the shell is recessed, the recesses 3 being directed inwardly. The porcelain core or other insulation body' e Specification of Letters Patent.

antes-tifare the element 4L from turning. The periphery or crown of. body si. is'beveed as at 6 and the shoulder 7 of the cap is correspondingly beveled so that when the cap is screwed to place the parts Gand 7 take a binding fit.

In the modification, Fig. '5, the porcelain or other .core is in two parts l5 and 20,' the part A20 being rotatable for interlocking Patented Feb. 2, 191,5.k Application flied July 315.1913. Serial No. 782,373.

purposes, as provided for in my prior application, Ser. No. 722,150, to prevent the un-y scrupulous removal of the lamp.

The part l5 is stationary as in F ig. l.

The shell has a ledge or shoulder 25 against which the depending wall or skirt of the cap may abut.

It will be obvious to those skilled in the art to which the invention relates that 1inod-y fications may be made in details Without departing from the spirit and scope of thesame. Hence the invention'is not limited other than required by the state of the prior art.

Having described Vthe nature andY objects of the invention what I claim as new and desire to secure'by Letters Patent is l The combination of a weatherprooffshelll externally threaded and having oppostely disposed inwardly opening notches, aporcelain or other core having lugs or offsets which engage said notches to prevent twisting of the core and having a beveled crown extending beyond the rim of the shell, and.

a weatherproof ecap Ahaving a depending wall or skirt with threads which engage the threaded part of the shell and having a beveled shoulder which takes a binding fit on the develed crown of the core.

In testimony whereof l afix my Aignature in presence of two witnesses.

CLAREN CE A. VETTER.

Witnesses:

MATILDA DQRNBURG, B. S. 

